Lennox 16HPX-048 - Demand Defrost Control (A108); Demand Defrost Control Connections and Settings

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24V TERMINAL STRIP
CONNECTIONS
(P2)
DIAGNOSTIC LEDS
(DS1 AND DS2)
PRESSURE
SWITCH CIRCUIT
CONNECTIONS
TEST PINS (P1)
Note - Component locations vary by board manufacturer.
SENSOR CONNECTION
(COIL AND AMBIENT
SENSORS)
(P4)
REVERSING VALVE
(O OUT)
DELAY PINS
(P5)
LOW AMBIENT
THERMOSTAT PINS
(P3)
DEFROST TERMINATION
PIN SETTINGS (P1)
Demand Defrost
Control (A108)
FIGURE 14. Demand Defrost Control (A108)